A historic site’s true purpose may have been revealed – as an Iron Age boozer.

Experts believe that 4600 years ago, thirsty natives may have been enjoying a pie and pint at Jarlshof in Shetland.

They say the layout of the stone settlement near Sumburgh Head suggests it may be the oldest pub ever found in Britain.

And a dozen or so quernstones – for grinding barley – indicate it may have served as both a drinking den and a bakery.

Jarlshof, described as “one of the most remarkable archaeological sites ever excavated in the British Isles” was first revealed after a storm in 1890.

It contains remains dating from 2500 BC up to the 17th century.

Experts including Shetland regional archaeologist Val Turner are in no doubt that – pub or not – there was beer being brewed at Jarlshof in the Iron Age.

Dr Noel Fojut, author of Prehistoric And Viking Shetland, said: “We know communal feasting, and probably drinking, was a feature of Iron Age life. Providing lavish hospitality seems to have been an important means of establishing social status.

“It’s difficult, however, to distinguish an inn or pub – where people paid – from a communal dining/drinking house.

“It’s an attractive idea that there may have a welcoming ‘howff’ at Shetland’s southern landfall and perfectly possible.

“But it’s much more likely any hospitality would have been offered by a local family, rather than by a commercial landlord as we’d imagine one today.”

The building has a house next door which has a large souterrain – which was the equivalent of a Iron Age refrigerator used for storing smoked or salted meats.

And during the early Iron Age, the site at Jarlshof was surrounded by crops of barley and emmer, a kind of wheat.

Scholars have long tried to make sense out of one of the oddities of the archaeological world —bodies pulled from ignominious burials in cold water bogs everywhere from Ireland to Russia.

Hundreds of these bog bodies have been found over the past two centuries. But who were they and why were they dispatched to the great beyond in mucky swamps? The theories range from executed deserters, to witches to everyday people.

The Irish Countess of Moira back in 1783 launched scholarly explorations by suggesting that bog bodies were victims of Druid ceremonies. Others, citing the ancient Roman writerTacitus, quickly saw them most likely as executed deserters. Arguments over individual finds have continued ever since the first look that year by the Countess at the Northern Ireland “Drumkeeragh” bog body, a woman dressed in wool clothes.

“Unfortunately the focus has been almost exclusively on the most spectacular finds, the mummified bodies,” says archaeologist Moten Ravn of Denmark’s Viking Ship Museum in Roskilde, writing in the current Acta Archaeologica journal. Rather than arguing from just one body, Ravn suggests a survey of all the bodies might offer better clues to how they ended up buried in bogs.

What is a bog and how does it preserve anything? Cold-weather swamps, basically, where mosses turn waters brown. Roughly 560 bog bodies have turned up in Denmark alone, Ravn notes, usually discovered when farmers try to turn wetlands into farmland. His survey focuses on 145 bog bodies dating to the early Iron and late Bronze Age, roughly 500 BC to 100 BC, the pre-Roman era in northern Europe.

Acids found in bog waters have mummified some of the bodies, or more accurately tanned them into leather. Mosses release chemicals that leach calcium from the bodies, “which means that the bones of the bog bodies take on the consistency of rubber,” Ravn writes. Other bogs rich in lime have preserved other bodies only as bones.

Scholars have raced up and down the human pecking order in ascribing identities to the bodies. The historian Niels Petersen in 1835 decided that the “Haraldskaer” woman’s body found at the site of a copper factory belonged to the Norwegian Queen Gunhilde, drowned by King Harald Blatund (Bluetooth) in the Ninth Century. By 1907, archaeologist Johanna Mestorf became convinced they were all executed criminals, noting many of the bodies were bound and naked.

Shades of Raiders of the Lost Ark, Nazi archaeologists dominated bog body research starting in the 1930’s until the end of the Third Reich, Ravn notes, “interested in proving that the so-called Nordic race were direct descendants of the proto-Germanic race,” dating back to the Bronze Age.

All of these ideas have problems, starting with Queen Gunhilde, who was unlikely to have been buried in leather scraps, as she was found. Also a 2004 Journal of Archaeological Science study notes that carbon dating finds the “Haraldskaer” bog body was actually 2,500 years old, not in King Bluetooth’s reign.

As for executed criminals, Ravn notes there are only 21 Danish cases where the bodies have demonstrably been restrained, which, “may be a general protection against ghosts and not something reserved for criminals,” he writes. About 34% of the Bronze and Iron Age bodies in his sample are clothed, and clothing may not endure in bogs as well as flesh does, explaining its absence. A 2009 study, also in the Journal of Archaeological Science led by Ulla Mannering of the University of Copenhagen, reports 44 instances of bog bodies found with clothes in Denmark, most dating to the Roman era.

The Nazi theory is just crackers, of course, with even their own archaeologists pointing out bog bodies turned up in Ireland and elsewhere, even as far south as Crete, far outside any “proto-Germanic” home.

Instead, “most archaeologists today support the sacrifice theory,” Ravn writes. Proposed in the 1950’s, the basic idea is that bog bodies were mostly offerings to the Nordic gods Odin or Nerthus (“Mother Earth”), with the rest either murder or accident victims. People were mostly cremated in the era, a point which suggests a bog burial must have been a special event.

An alternative is the idea proposed in 2002 by historian Allen Lund that the bog bodies belonged to witches. Ancient people knew about the preserving nature of bogs and sought to suspend their supernatural foes in a state between life and death to forestall being haunted by them.

Ravn proposes a new theory to explain some of the bog bodies — maybe they were just people who died of natural causes and were sent to their burial in the bogs by their relatives. There is nothing special about the range of 145 people in his survey, men, women, young and old. Some were clearly placed in excavated holes lined with bark and cotton, buried with glass beads or gold jewelry in their mouths, a Roman custom. In Celtic myths, bogs and lakes were places of healing, Ravn suggests. “Is it possible that there was a wish to pass on these healing characteristics of the bog to a person who died a natural death so that the deceased could arrive healthy in the realm of the dead,” he asks.

Overall, bog bodies are “not so easy to explain,” Ravn says. The oldest one, the Koelbjerg woman, dates to 10,000 years ago. Others date to modern times, such as Johann Spieker, a hawker (person who used trained falcons to hunt), who died in 1828. “The reason that people were given their final resting place in the bog was not because of any one single tradition or one single ritual,” Ravn concludes. “Some were due to accidents and others to murder. Some may have been sacrificed and others may have died of natural causes and were buried in the bog.”